They were inseparable until an innocent mistake tore them apart.
Growing up, Viola and Issy clung to each other in the wake of their mother's eccentricity, as she dragged them from a commune to a tiny Welsh village. They thought the three of them would be together forever.
But an innocent mistake one summer set them on drastically different paths. Now in their twenties, Issy is trying to hold together a life as a magazine art director, while Viola is slowly destroying herself, consumed with guilt over the events they unknowingly set into motion as children.
When it seems that Viola...

1984 - Suffolk, England.
When 17-year-old Eva goes missing at sea, everyone presumes that she drowned. Her parents' relationship is falling apart, undermined by guilt and grief. But her younger sister, Faith, refuses to consider a life without Eva; she's determined to find her sister and bring her home alive.
Close to the shore looms the shape of an island -- out of bounds, mysterious, and dotted with windowless concrete huts. What nobody knows is that inside one of the huts Eva is being held captive. That she is fighting to survive -- and return home...